Results 131 to 140 of about 257,743 (313)

Analysis of the doubly heavy baryon states and pentaquark states with QCD sum rules [PDF]

open access: yesThe European Physical Journal C, 2018
In this article, we study the doubly heavy baryon states and pentaquark states with the QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension 7 and 13 respectively in a consistent way.
Zhi-Gang wang
semanticscholar   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

open access: yesAstronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

Baryon-Baryon-Meson Coupling Constants in QCD

open access: yesAIP Conference Proceedings, 2010
The strong coupling constant of decuplet and octet baryons to vector and pseudoscalar mesons are calculated in light cone QCD sum rules in general case and when the SU(3)f symmetry is taken into account. A comparison of the obtained results with the existing experimental data and predictions of the other nonperturbative approaches is also made.
T. M. Aliev   +10 more
openaire   +2 more sources

Natural mass hierarchy among three heavy Majorana neutrinos for resonant leptogenesis under modular A 4 symmetry

open access: yesJournal of High Energy Physics, 2022
It is clear that matter is dominant in the Universe compared to antimatter. We call this problem baryon asymmetry. The baryon asymmetry is experimentally determined by both cosmic microwave background and big bang nucleosynthesis measurements. To resolve
Dong Woo Kang   +3 more
doaj   +1 more source

Confining Bond Rearrangement in the Random Center Vortex Model

open access: yes, 2016
We present static meson-meson and baryon--anti-baryon potentials in Z(2) and Z(3) random center vortex models for the infrared sector of Yang-Mills theory, i.e., hypercubic lattice models of random vortex world-surfaces.
Altarawneh, Derar   +2 more
core   +1 more source

Measurement of matter–antimatter differences in beauty baryon decays [PDF]

open access: yesNature Physics, 2016
Differences in the behaviour of matter and antimatter have been observed in K and B meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined charge-conjugation ...
L. C. R. Aaij   +499 more
semanticscholar   +1 more source

Euler–Heisenberg Black Hole Surrounded by Quintessence in the Background of Perfect Fluid Dark Matter: Thermodynamics, Shadows, and Quasinormal Modes

open access: yesFortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract Current observations show that a significant fraction of the Universe is composed of dark energy and dark matter. In this paper, the simultaneous effects of these dark sectors on the Euler–Heisenberg black hole are investigated, using the quintessence matter field and perfect fluid to model them. In particular, the black hole's thermodynamics,
Bilel Hamil, Bekir Can Lütfüoğlu
wiley   +1 more source

Recent results of Baryon electromagnetic form factors at BESIII [PDF]

open access: yesEPJ Web of Conferences
Baryon Electromagnetic Form Factors are essential for testing ground state models of nucleon internal structures. At the BESIII experiment, a comprehensive study has been conducted on the electromagnetic form factors of various baryons.
Xia Lei
doaj   +1 more source

Branching fractions of B meson decays in Mesogenesis

open access: yesJournal of High Energy Physics, 2023
Production of the matter-antimatter asymmetry in the B-Mesogenesis mechanism is directly related to the branching fraction of seemingly baryon number violating decays of B mesons into a light Standard Model baryon and missing energy.
Gilly Elor   +1 more
doaj   +1 more source

Is Heavy Baryon Approach Necessary? [PDF]

open access: yes, 1999
It is demonstrated that using an appropriately chosen renormalization condition one can respect power counting within the relativistic baryon chiral perturbation theory without appealing to the technique of the heavy baryon approach.
Becher T   +19 more
core   +4 more sources

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